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Streptococcus DNA Detection by Nucleic Acid Amplification (Qualitative)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of genetic material from certain types of *Streptococcus* bacteria, commonly associated with throat infections like strep throat.

Quick summary

["Helps diagnose bacterial throat infections quickly and accurately."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
106609-1
Short code
Streptococcus DNA Fld Ql NAA+n-prb
Synonyms
Streptococcus DNA Fld Ql NAA+n-prb
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
non-probe-amp-tar
CPT
85610
SNOMED
396252006
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like sore throat, fever, swollen lymph nodes, or redness in the throat. It’s often used to confirm strep throat, especially when antibiotics are needed to prevent complications like rheumatic fever.

How the Test Works

A small sample of your throat is collected using a swab. The swab is then tested in a lab to detect genetic material from *Streptococcus* bacteria using a process that amplifies tiny amounts of DNA for detection.

What to Expect Before the Test

No special preparation is needed. You may have a sore throat or discomfort during the swab collection, but it usually takes only a few seconds. If you’re on blood-thinning medication, let your provider know before the test.

What to Expect After the Test

The results are typically available within 24 hours. You’ll receive them from your healthcare provider. If the test is positive, follow their advice on treatment, often with antibiotics.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: serum

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Strep DNA Test (Qualitative)

Frequently asked questions

How long does it take to get results?
Results are usually available within 24 hours, but this may vary by lab. Your provider will contact you once they have the results.
Can I eat or drink before the test?
You can eat and drink normally before the test. No special preparation is required.
What if I have a negative result but still feel sick?
If you have symptoms like a sore throat or fever but test negative, other causes (such as viral infections) may be the issue. Follow up with your provider to discuss further testing or treatment options.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy